------------[ cut here ]------------
WARNING: CPU: 1 PID: 4630 at net/mac80211/tx.c:4883 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4883 [inline]
WARNING: CPU: 1 PID: 4630 at net/mac80211/tx.c:4883 __ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5107
Modules linked in:
CPU: 1 PID: 4630 Comm: syz.1.90 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4883 [inline]
RIP: 0010:__ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5107
Code: 1d f8 0f 0b 4f 89 64 2f 04 4f 89 64 2f 0c 43 c6 44 2f 14 f8 e9 19 fe ff ff e8 12 8f 1d f8 0f 0b e9 16 ef ff ff e8 06 8f 1d f8 <0f> 0b e9 7c f2 ff ff e8 ba ec 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff895b9e8a RBX: ffff888075811a00 RCX: ffff888026bb8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0af8 R08: ffff888026bb8000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: f8f8f8f8f8f8f8f8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS:  00007f60bdecb6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000232030 CR3: 00000000216b0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5226
 ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
 mac80211_hwsim_beacon_tx+0x104/0x900 drivers/net/wireless/mac80211_hwsim.c:1812
 __iterate_interfaces+0x225/0x4c0 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4ea/0xb60 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__mutex_unlock_slowpath+0x668/0x6c0 kernel/locking/mutex.c:896
Code: 44 04 04 f8 4c 8d 7c 24 60 48 8b 3c 24 e8 a0 fe 00 00 4c 89 ff e8 78 71 80 f7 48 b8 00 00 00 00 00 fc ff df 41 c6 44 04 0c f8 <66> 41 c7 44 04 08 f8 f8 48 c7 44 24 20 0e 36 e0 45 49 c7 04 04 00
RSP: 0018:ffffc900032df680 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff89d1fe30
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900032df700
RBP: ffffc900032df770 R08: ffffc900032df707 R09: 1ffff9200065bee0
R10: dffffc0000000000 R11: fffff5200065bee1 R12: 1ffff9200065bed4
R13: ffff888076297d38 R14: 1ffffffff1cdacbb R15: ffffc900032df700
 __unix_dgram_recvmsg+0x9e6/0xd50 net/unix/af_unix.c:2396
 ____sys_recvmsg+0x2ca/0x5b0 net/socket.c:-1
 ___sys_recvmsg+0x213/0x5c0 net/socket.c:2707
 do_recvmmsg+0x360/0x7f0 net/socket.c:2801
 __sys_recvmmsg net/socket.c:2880 [inline]
 __do_sys_recvmmsg net/socket.c:2903 [inline]
 __se_sys_recvmmsg net/socket.c:2896 [inline]
 __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2896
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f60bfc95b19
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
vkms_vblank_simulate: vblank timer overrun
RSP: 002b:00007f60bdecb028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f60bff1c090 RCX: 00007f60bfc95b19
RDX: 0000000000010106 RSI: 00002000000002c0 RDI: 0000000000000005
RBP: 00007f60bfd2db70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60bff1c128 R14: 00007f60bff1c090 R15: 00007ffc4d73dd78
 </TASK>
----------------
Code disassembly (best guess):
   0:	44 04 04             	rex.R add $0x4,%al
   3:	f8                   	clc
   4:	4c 8d 7c 24 60       	lea    0x60(%rsp),%r15
   9:	48 8b 3c 24          	mov    (%rsp),%rdi
   d:	e8 a0 fe 00 00       	call   0xfeb2
  12:	4c 89 ff             	mov    %r15,%rdi
  15:	e8 78 71 80 f7       	call   0xf7807192
  1a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  21:	fc ff df
  24:	41 c6 44 04 0c f8    	movb   $0xf8,0xc(%r12,%rax,1)
* 2a:	66 41 c7 44 04 08 f8 	movw   $0xf8f8,0x8(%r12,%rax,1) <-- trapping instruction
  31:	f8
  32:	48 c7 44 24 20 0e 36 	movq   $0x45e0360e,0x20(%rsp)
  39:	e0 45
  3b:	49                   	rex.WB
  3c:	c7                   	.byte 0xc7
  3d:	04 04                	add    $0x4,%al